Fire arch for locomotive boilers



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E R MANOR FIRE ARCH FOR LOCOMOTIVE BOILERS Filed. June 18 19,24

Dec. 8, 1925. 1,564,875

E. R. MANOR FIRE ARCH FOR LOCOMOTIVE BOiLERS Filed June 18, 1924 5ShetS-Sheet 2 jm zwy E. R. MANOR FIRE ARCH FOR LOCOIIOTIVfl BOILERSFiled June 18, 1 ,924 3 Sheets-Sheet s Patented Dec. 8, 1925.

UNITED STATES App1iation newline 1 1524. Seria1No. 720,786.-

V Z '0 all whom it may concern.

Be it known that I, ELI R. MANOR, a citizen of the United States,residing at St. Paul, in the county of Ramsey and State of Minnesota,have invented certain new and useful Improvements in Fire Arches forLocomotive Boilers; and I do hereby'declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art ,to which appertains to make and use the same.

My invention provides anextremely Simple and highly eflicientair-ventilated fire nordance with my .invention, the air is supplied tothe air passages of the blocksdirectly through the side plates of thefire'lbox and the air thus drawn in through thefire blocks or tiles ofthe arch will be superheated and delivered into the combustion chamberof the fire box, thereby intensifying the combustion'and producing morerapid initial combustion with the resulting greater economy in the useof fuel and elimination of the smoke nuisance. I w

In the accompanying drawings, which illustrate the invention, likecharacters indicate like parts throughout the several-views.

Referring to the drawings: j v

Fig. 1 is a fragmentary verticalsection taken from front to rear throughthefire box of the locomotive substantially on the line 11 of Fig. 2;

Fig. 2 is at'ran'sverse section taken on the line 2-2 of Fig. 1;. I v

Figs. 3 and 4 are perspective views showing in detail certain of thearch blocks or tiles illustrated in Figs. 1 and 2; i

Fig. 5 is a transverse section on the line 5-5 of Fig. 1;

Fig. 6 is a plan view showing a portion of the arch, some parts beingbroken away;

Fig. 7 is a fragmentary vertical section on the line 7-7 .Of Fig: 6 l

rmii' ARCH. roeroooivrorrvn BOILERS.

'Fi 8 is a view corresponding'toFig. 5, but i 'lustrating a the blocks;and v 'Fig. 9 is a view corresponding to Fig. 7, but illustrating afurther modified form of the arch blocks.

The numerals 10' and 11 indicate, respectively, the shell of the firebox and the surv rounding boiler shell, which parts are of the slightlymodified'forin of 1,564,875 ATENTT. OFFICE;

ELI nomaivomforsrl PAUL, ammo. a :11

customary well knownarrangement,spaced to form a water space 12 thatsurrounds and overlies the fire box. The numeral 13 indicates thecustomary fuel supply passage normally closed by the'customarydoor, notshown. The numeral 14 indicates the arch fiues that extend from rear'tofront through the combustion chamber, are forwardly 1nclined, andconnect the front and rear portions of the water space or 'leg' '12. Thenumerals 15 indicate clean-out plugs applied to the boiler shell 11 inline with the ends of the archtubes 14. This is the customaryarrangement of arch tubes and, as already stated, such arch tubes havehitherto been used to support'arch-forming blocks or tiles.

' Preferably, the arch is made up 'of highly refractory blocks or tiles16 and-17 of the form illustrated in Figs. 1, 2, 3, 4, 5, 6 and 7. Theblocks 16, at the under sides of their end portions, are formed withsegmental notches 16 that fit and rest upon the'arch tubes 14, and theblocks 17 that are at the sides of the arch are provided at their innerends with similarsegmental notches that also fit and rest upon the archtubes. outer ends, the side blocks 17 are formed with recesses thatadapt them to be telescoped onto the inwardly projecting ends of shortair intake tubes 18 that extend directly through the sides of the outershell 11 and firebox'lO. These air intake tubes 18 are flanged andexpanded in the sides of the shells 10 and 11, so that fluid-tightjoints are formed 1 and the inwardly projecting ends thereof-affordsupports for the'outer At their ends of the said blocks 17. Preferably,the. said air tubes 18 are of highly refractory alignment register witheach other, so that they form a complete transverse air passage. Thearch blocks illustrated in Figs. 1, 2, 4, 5, 6 and 7, at their abuttingends, 6 are formed with interlapping tongue and groove joints at 21 that'hold the blocks against shifting movements forwardly and rearwardly ofthe arch, but the block shown in Fig. 1 has a simple flat end.Bothjtypes of blocks just noted, however, are provided with relativelysmall air discharge passages 22 that lead' upwardly to the tops of theblocksfrom the mainair passages and deliver air to the top of the a-rch. In the --form of the arch shown in Fig. 8, the blocks are furtherprovided with small air passages 23 that lead downwardly 'to the.

-upper portion of the/arch and, hence, in--v ten'sify the combustion atthis turning point :-,and,-moreover, assist in keeping down thetemperature oft-he-blocks at the place where the fia'meslap around theblocks and would otherwise have maximum fusingaction on thevblocks. Theblocks atthe frontedge of the arch, adjacent-to the-'low front w'allofthe fire boX,'may be and, as=shown, are slightly spaced from the saidfirebox by laterally spaced relatively small spacing blocks or firetiles 25-placed on the: lower endsof the arch tubes 14, as shown inFigs. 1 and .6. .This arrangement permitsypassage of some of the flamesdirectly through the front and lower portion of'thearch.

In assemblying the blocks of the arch, "the blocks 17 should first'beielescoped onto the projecting ends of the air intake tubes 1=8 andrested on the outer arch tubes 14 and then the intermediate blocks may'-be readily dropped into, position. The-air intake tubes are thus notonly utilized to at least in part support the vblocks 17,.but they holdthe said blocks against shifting movements forwardly and rearwardly andinsure the main air passages QO always being in line with the air intakepassages through the sides of the fire box.

Ofeourse. the fire bloc-ks will become very iniFig. 9igives a morecomplete and better .in Fig. 6, the blocksof the arch are interhot inthe operation of the locomotive, so

that air drawn in by suction or partial vacuum will be heated to hightemperature pinto thecombtistion space above the arch, but otherfkindsof fuel will burn with, the

greatest kind of -,efficiency when the air is-discharged both above. andbelow the arch. For example, in the use of .high combustion '-fuel,'suchas coal, that burns rapidly and with a quick=flash, it is better tointroduce the superheated air at the upper rather than at the. lowerportion of the arch, for the reason that introduction of the hot airbelow the arch would tend to rapidly hasten the combustion and. causethe flames .to flash from the fuel door when opened. In certaln slowerburning coals or fuels, the lntroduction of. the superhetated air .bothabove and ,below the arch willgive the vbest results.

However, these are conditions best determined by experiment. The-vert1cal and oblique arrangement of a1r passages shown distribution ofthe superheated air, but the .more simple-arrangements illustrated willproperly meet most conditions. By xinterlocking the'ends of the..blocksas best shown connected so that theycannot shift out ofmrelativepositions, even if some of the-spacing-blocks 25 oroth-erblocks of the arch should giveaway.

What I claimis:

A-boiler of thelocomotive type provided with arclrtubesextended throughthe fire box thereof from the surrounding water space, incombinationwith arch-forming blocks supported .on said arch tubes with their endsabutting above said tubes and provided witlraligned air passagesextended transversely through the arch and delivering into thecombustion chamber, and-intake tubes extended directly .throughuthesides of the boiler-and projecting-into the aligned a1r passages andassisting and supporting adjacent blocks, said air intake tubes beingprovided on both sidesof the [ire box, each transverse 1 row of archforming blocks having the transverse air passages noted,

,7 and there being oneair intake tube injected into eaclrend or each ofthe transverse air passages of the arch tor-med by said blocks.

In testimonywhereofI affix my signature.

ELI MANOR

